Question

Define Primary key and briefly explain why is it

important?

Also Tell How To Access Primary Key!​

Answer 1

Answer:

A primary key is a minimal set of attributes (columns) in a table that uniquely identifies tuples (rows) in that table. Lets take an example to understand the concept of primary key.

Answer 2

Answer:

primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. ... A primary key's main features are: It must contain a unique value for each row of data.